Lift Pump Handle

[MBlanks]

Hey guys, I just have a quick question. Both me and one of my good friends who has another W250 cannot seem to get our lift pump handles to work. They are just completely loose and have no resistance. I read in the manual that you could try turning the motor over slightly and they should work, however this did not help either one of our lift pump handles. Any ideas? Are they broken or just we're not smart enough to operate a little handle?



Thanks,

Mark

 

[drturf0]

sounds like maybe its time for you to replace the lift pump, mine was doin the same thing. replaced the pump , now all is fine.

 

[Greenleaf]

Re-place-the-pump



Green-leaf

 

[1stgen4evr]

lift handle

You can verify the condition of the pump as to the handle thing. All engines have a tendency to stop at the exact same place. When you are at the top of the cam lobe for the pump, the handle will be loose and produce no result. You will have to turn the motor at the front pulley by hand some how and try the lift handle in different positions of the crank. If it is still dead, carry on with the replacement. I am wondering why this is so much of a problem as I have only used mine a very few times in 395k miles. I fill the replacement filter before installing and a couple turns with the starter will purge the bleeder. I always install the filter with the tank completely full. That keeps the supply line from draining back as much. It isn't supposed to drain back at all if the valves in the pump are jam up but it can and will if the lift pump is old.



Good luck

Love my Cummins

1stgen4evr

Viva La TDR

 

[farmall]

Re: lift handle

Originally posted by 1stgen4evr

You can verify the condition of the pump as to the handle thing. All engines have a tendency to stop at the exact same place. When you are at the top of the cam lobe for the pump, the handle will be loose and produce no result. You will have to turn the motor at the front pulley by hand some how and try the lift handle in different positions of the crank. If it is still dead, carry on with the replacement. I am wondering why this is so much of a problem as I have only used mine a very few times in 395k miles. I fill the replacement filter before installing and a couple turns with the starter will purge the bleeder. I always install the filter with the tank completely full. That keeps the supply line from draining back as much. It isn't supposed to drain back at all if the valves in the pump are jam up but it can and will if the lift pump is old.



Good luck

Love my Cummins

1stgen4evr

Viva La TDR

Well even if you fill the filter up and do not use the lift pump, it still doesn't mean that it's ok to run with it bad. I did that for a while, because it was bad when I bought the truck and never fully understood it's operation. When I replaced mine, I gained over 100 rpm at idle. That tells me how much fuel my inj. pump was starving for. Not only does it help your performance, but you have to remember the VE pump is cooled and lubricated soley by fuel. The more fuel it has, therfore the longer it will last. Not to mention insured top performance from your pump with a full supply of fuel.



The part is cheap enough, I think it should be replaced every 100,000 miles. You can get a Carter lift pump for around $30. To me that is pretty cheap insurance against $1,200 - $1,500. If your bad lift pump would cause it to fail.



This is just my humble opinion guys. But over a 100rpm difference at idle tells you a lot.



Bill

 

[BushWakr - RIP]

Keep in mind you may have to rotate the engine a fair bit to find just the right spot too... I found that on my truck.

Also, the handle needs to be in the "up" position when you're done with it... if you leave it downward, damage will result.



bob.

 

[1stgen4evr]

lift handle

I will go along with that for sure Bill. I left out that part. I sometimes forget that the new guys don't have as many miles of experience behind them. I wasn't thinking about low pump pressure and would be working on something else if I thought that was the porblem. Most of the older tractors with diesels had a deliver pump pressure guage. That would tell a lot if we had one.



James

1stgen4evr

 

[JLEONARD]

I just replaced my lift pump at 130 K miles. Ran good, but I wanted to have a new one just to make me feel better.

Put on a Carter... but paid $66 ... that was "cost" at my son's repair shop.

Jay